0.26.0

• added bangumi provider #52
• improved volume number resolution to allow handling of oneshots without volume number
• include alternative title if it contains language tag but no type when updating komga metadata
• fixed incorrect parsing of authors in yenpress provider
• fixed incorrect parsing of japanese titles for some series in bookwalker provider
• fixed volume number resolution for books with series name volume 1, 2, 3 naming convention
• fixed serialization of MA15 age rating tag in comicinfo write mode